Making 3 points stick on a plane / flag with wind
Such simple shape should be modeled directly in Blender, I see no need to import an SVG. Resulting bezier curve objects have poor topology with uneven density, unsuited for most tasks like simulations.

I'd model it manually with an even quad based topology, create a Vertex Group for the side closest to the post, then use a Subdivision surface Modifier before the Cloth simulation.



Use the Pinning option for the above Vertex Group and add the force field.